中心博士生赵阳的工作——Integration of endogenous sensing and communication based on photonics-enabled cellular base station networks with a spectrum fusion algorithm的相关成果近期被Optics Express期刊接收发表，该工作得到了国家自然科学基金（T2225023, 62205202）的部分资助。本文提出了一种基于模拟光纤无线电的光子使能蜂窝基站网络，该网络集成了适用于多个窄带通信信号的频谱融合算法，以实现内生的通信感知一体化。频谱融合算法可以融合蜂窝基站中共存的异构宽带正交频分复用（OFDM）信号的频谱资源，例如多种制式的OFDM信号、同制式下不同载波频率的OFDM信号，以及扩频信号等，这些信号携带了丰富的目标空间采样信息，通过重构扩展的空间频谱矩阵，提高了成像的分辨率。公式推导和仿真结果表明，融合通信频谱资源可显著提高成像分辨率，在相同孔径下优于现有通信成像一体化方法。外场实验结果表明，融合通信频谱资源后的成像分辨率达到~3.5 cm × ~4 cm，可对复杂目标（如汽车）成像，同时最大通信数据速率为6Gbps。本文通过算法与硬件架构的协同设计，实现了兼容标准通信波形的高分辨成像，赋能蜂窝基站具备高质量内生的通信感知一体化功能。
摘要: Endogenous integrated sensing and communication (ISAC) based on cellular base stations (BSs) can simultaneously achieve high-quality imaging and communication, which is one of the key technologies for future applications. However, due to the lack of a communication-compatible high-resolution algorithm and hardware co-design, current ISAC methods cannot simultaneously balance imaging and communication performance. To address this, we build photonics-enabled cellular BS networks using analog radio-over-fiber (AROF), which can integrate a spectrum fusion algorithm derived from the advanced concept of bandwidth-enhanced microwave forward-looking imaging (MFI) to achieve endogenous ISAC. The spectrum fusion algorithm reconfigures the spatial spectrum to achieve a high-resolution MFI by fusing the spectrum resources of coexisting heterogeneous broadband orthogonal frequency-division multiplexing (OFDM) signals. The photonics-enabled cellular BS network not only satisfies the requirements of the algorithm for synchronization and carrier frequency preservation but also responds to the communication trend of high-efficiency fronthaul. The formulation and simulation results show that the imaging resolution can be significantly improved with the fusion of communication spectrum resources, achieving a higher resolution than that of existing ISAC methods at the same aperture. An ISAC demonstration system is built. The experimental results show that the imaging resolution of the fused communication spectrum resources is ∼3.5 cm × ∼4 cm, and the complex target (vehicle) can be imaged. Additionally, the maximum achievable communication data rate communication rate is 6Gbps.